"One reason for that is the expanding supply of antimicrobial technologies, which now is up to 15 or 20 different types and methods. Previously, the average cleaner, building service contractor and restorer knew antimicrobials primarily as ''quats,'' phenolics, alcohol and blends. Today, there is an explosion of types, claims and hype regarding all healthy cleaning products, methods, equipment and systems — with or without chemical disinfection," Spivak added.